Microwave oven



FIG. 1 is a front/right-side/top perspective view of a microwave oven showing our new design;

FIG. 2 is a front-side elevational view thereof;

FIG. 3 is a rear-side elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top-side elevational view thereof; and,

FIG. 7 is a bottom-side elevational view thereof. 

I claim the ornamental design for microwave oven, as shown. 